im 16 and thinking about laser treatement

I have a very big hair problem on my face. Mainly my upper lip and side burns. Im light brown and have dark hair. I read some of the forums and it said if i get this treatment i might have a shadow. I dont do anything to my face xcept bleech. I was wondering how bad this shadow would be and would i HAVE to shave? High school would be tough with a 5 o clock shadow :fearful: . Thank you